Buggy code:
public class HttpClientWrapper implements Closeable { private static final Logger LOG = LoggerFactory . getLogger ( HttpClientWrapper . class ) ; private CloseableHttpClient m_httpClient ; private CookieStore m_cookieStore ; private boolean m_useLaxRedirect = false ; private boolean m_reuseConnections = true ; private boolean m_usePreemptiveAuth = false ; private boolean m_useSystemProxySettings ; private String m_cookieSpec ; private String m_username ; private String m_password ; private Integer m_socketTimeout ; private Integer m_connectionTimeout ; private Integer m_retries ; private Map < String , SSLContext > m_sslContext = new HashMap < > ( ) ; private Set < HttpRequestInterceptor > m_requestInterceptors = new LinkedHashSet < > ( ) ; private Set < HttpResponseInterceptor > m_responseInterceptors = new LinkedHashSet < > ( ) ; private String m_userAgent ; private String m_virtualHost ; private HttpVersion m_version ; protected HttpClientWrapper ( ) { } public static HttpClientWrapper create ( ) { } public HttpClientWrapper addBasicCredentials ( final String username , final String password ) { } public HttpClientWrapper addRequestInterceptor ( final HttpRequestInterceptor interceptor ) { } public HttpClientWrapper addResponseInterceptor ( HttpResponseInterceptor interceptor ) { } public HttpClientWrapper dontReuseConnections ( ) { } public HttpClientWrapper useSystemProxySettings ( ) { } public HttpClientWrapper useBrowserCompatibleCookies ( ) { } public HttpClientWrapper useRelaxedSSL ( final String scheme ) throws GeneralSecurityException { } public HttpClientWrapper trustSelfSigned ( final String scheme ) throws GeneralSecurityException { } public HttpClientWrapper usePreemptiveAuth ( ) { } public HttpClientWrapper useLaxRedirect ( ) { } public HttpClientWrapper setSocketTimeout ( final Integer socketTimeout ) { } public HttpClientWrapper setConnectionTimeout ( final Integer connectionTimeout ) { } public HttpClientWrapper setRetries ( final Integer retries ) { } public HttpClientWrapper setUserAgent ( final String userAgent ) { } public HttpClientWrapper setVirtualHost ( final String host ) { } public HttpClientWrapper setVersion ( final HttpVersion httpVersion ) { } public void close ( final CloseableHttpResponse response ) { } @ Override public void close ( ) throws IOException { } public CloseableHttpResponse execute ( final HttpUriRequest method ) throws IOException , ClientProtocolException { <START_BUG> HttpClientWrapper . LOG . debug ( ( "execute:<seq2seq4repair_space>" + ( this . toString ( ) ) ) ) ; <END_BUG> final HttpRequestWrapper requestWrapper = HttpRequestWrapper . wrap ( method ) ; if ( ( ( m_userAgent ) != null ) && ( ! ( m_userAgent . trim ( ) . isEmpty ( ) ) ) ) { requestWrapper . setHeader ( USER_AGENT , m_userAgent ) ; } if ( ( ( m_virtualHost ) != null ) && ( ! ( m_virtualHost . trim ( ) . isEmpty ( ) ) ) ) { requestWrapper . setHeader ( TARGET_HOST , m_virtualHost ) ; } if ( ( m_version ) != null ) { requestWrapper . setProtocolVersion ( m_version ) ; } return getClient ( ) . execute ( requestWrapper ) ; } public HttpClientWrapper duplicate ( ) { } public CloseableHttpClient getClient ( ) { } protected void assertNotInitialized ( ) { } protected void setCredentials ( final HttpClientBuilder httpClientBuilder , final String username , final String password ) { } protected void enablePreemptiveAuth ( final HttpClientBuilder builder ) { } protected void configureSSLContext ( final HttpClientBuilder builder ) { } @ Override public String toString ( ) { } }

Fix:
HttpClientWrapper . LOG . debug ( ( ( ( "execute:<seq2seq4repair_space>" + ( this . toString ( ) ) ) + ";<seq2seq4repair_space>method:<seq2seq4repair_space>" ) + ( method . toString ( ) ) ) ) ;